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May 15, 1934.

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CALCULATING MACHINE Filed July 9. 1930 '19 Sheets-Sheet 17 o f 0 J76 o May 15, 1934. H. ISHERWOOD CALCULATING MACHINE Filed July 9, 1930 19 Sheets-Sheet 19 Patented May 15, 1934 UNITED STATES PATENT OFFICE In Great Britain July 19, 1929 68 Claims. (Cl. 235-61) This invention relates to calculating machines for performing multiplication of the general type which comprises members of the nature of stops to which number values are assigned, these num- 5 bers being first selected and positioned as a result of depressing keys to feed in the figures in the two factors and being subsequenty felt for the purpose of ascertaining the number values represented by them. The number values which have been thus ascertained in terms of distances moved are then transmitted into answer-indicating mechanism. One object of the present invention is to provide for a calculating machine of the above type improved key-actuated selecting mechanism for stop members constituting mechanical representations of partial products. v

A further object of the present invention is to provide an improved construction and arrangement of members constituting mechanical representations of partial products together with mechanism for operating these members. For convenience these members are referred to in the specification and claims by the arbitrarily selected term templates. It will nevertheless be understood that the term is intended to designate members having such configuration that by their position with respect to cooperating portions of the machine they may represent a value or values, and that the'word is not to be understood in its more common sense in which it is applied to a member used for a pattern or guide.

:A further object of this invention is to provide improved means for feeling the template membersso as to ascertain the numerical values of the partial products represented by them and to transmit these partial products into answer-indicating mechanism.

Yet another object of the present invention is to provide a complete calculating. machine of the proved key-actuated selecting mechanism, the improved template members and means for operating 0118111,, and the improved feeling mechanism toand a plurality of individually movable members mounted on a carriage and arranged in sets the number of these members in each set correspending to the number of the key-actuated type indicated wherein are combined the imgether with mechanism for presenting the answer nism comprises a set of key-actuated members.

members. The carriage can be traversed relatively to the key-actuated members and the movable members on the carriage can thus be brought in successive sets into operative registration with the key-actuated members so that when the keys are operated to feed in the figures in the first factorin the sum to be performed, members on the carriage in successive sets will be selected and moved. There is a number of sets of individually movable members, such as rotatable templates, constituting mechanical representations of partial products, the number of these partial product members corresponding to the number of the movable members on the carriage and being arranged in similar sets. As the carriage is traversed, the movable members thereon which have been selected by key actuation are brought into operative registration with respect to the partial product members. By suitable means all the selected carriage members can then be moved simultaneously, thereby causing selection of corresponding partial product members which at the same time are rendered operative. By key-actuatedmeans there are imparted to the selected partial product members positioning movements determined by the value of the figures in the second factor. When thus positioned these partial product members are felt by suitable means and the partial product values are thereby ascertained in terms of distances moved. These partial' product values are transmitted into answerindicating mechanism.

The arrangement of the keys and the means by which the figures in the first factor are fed into the machine as also the construction and manner of operation of the key-actuated, members may vary. The movable members indicated above as being mounted on the sliding carriage may be formed and arranged in various ways with respect to their manner of movement on the carriage and with respect to those parts of these members which, on the one hand, are acted on by the key-actuated members, and on the other hand those parts which efiect selection of the partial product members. Further, after the members on the carriage have been selectively moved, various means may be adopted for moving all these members simultaneously so that they may elfect selection of the partial product members. This movement is, however, preferably imparted to the carriage members by movement of the carriage as a whole.

The above-mentioned key-actuated selecting mechanism may be employed in conjunction with various types and structures of partial product 

